Plotting a Sequence over a Given Interval

3 views (last 30 days)
Connor Wright on 9 Jan 2021
Answered: Star Strider on 9 Jan 2021
I am trying to plot the follwing sequence,
𝑥(𝑛) = 𝑛[𝑢(𝑛) − 𝑢(𝑛 − 10)]+ 10𝑒 −0.(𝑛−10) [𝑢(𝑛 −10) − 𝑢(𝑛 − 20)]
Over this interval
0 ≤ 𝑛 ≤ 20
I already have some code from a previous attempt at this type of problem which is as follows,
% USMPL Function %
function delta = usmpl(n)
if n == 1
delta = 1
else
delta = 0
end
% Main Code %
n = -10:10
x = zeros(length(n)
for k = 1:length(n)
x(k) = 2*usmpl(n(k)+ 1) - usmpl(n(k)-6);
end
stem(n,x)
The problem I am having is working out what to put where in this code to make it work for this problem.
Thanks.
Connor Wright on 9 Jan 2021
So would it be feesible to just modify my USMPL code and make u the focus instead of delta?

Star Strider on 9 Jan 2021
I have no idea.
I would just do something like this, and hope for the best with respect to whatever that exp() call is supposed to do:
u = @(t) t>=1;
x = @(n) n.*(u(n)-u(n-10) + 10*exp(-0*(n-10)) .* (u(n-10)-u(n-20)));
n = linspace(0, 20, 1000);
figure
plot(n, x(n))
grid
Make appropriate changes when you resolve the problem with the exponential term.

Categories

Find more on Get Started with MATLAB in Help Center and File Exchange

R2020b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by